US7293336B2 - Method for consolidating a material web made from wood pulp - Google Patents

Method for consolidating a material web made from wood pulp Download PDF

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Publication number
US7293336B2
US7293336B2 US10/478,974 US47897404A US7293336B2 US 7293336 B2 US7293336 B2 US 7293336B2 US 47897404 A US47897404 A US 47897404A US 7293336 B2 US7293336 B2 US 7293336B2
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Prior art keywords
wood pulp
ply
fibers
fabric web
needling
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Expired - Fee Related, expires
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US10/478,974
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US20040221437A1 (en
Inventor
Gerold Fleissner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/26—Wood pulp
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay

Definitions

  • EP-A-0 359 615 discloses a method for forming a fabric web only from cellulose fibers such as wood pulp, which web is formed by a wet process and then only dried. Strengthening in the sense of an intertwining of the fibers with one another does not take place there.
  • EP-A-0 308 320 teaches the preparation of a more highly strengthened fabric web by feeding onto a fabric web made of wet-laid endless filaments a further ply made of up to 90% wood pulp mixed with staple fibers. Both together are then strengthened by hydrodynamic needling.
  • U.S. Pat. No. 6,110,848 views a composite as advantageous if the wood pulp ply, with a thickness of up to 90%, has an underply made of a nonwoven fabric made of carded staple fibers between 30 and 100 mm.
  • Such composites are advantageous in many application situations, but the manmade fibers that are held to be necessary do not absorb any moisture, for which reason a further product is sought that likewise has adequate strength.
  • the goal of the invention is therefore to find a method for manufacturing a nonwoven fabric that has the greatest possible liquid absorption capacity and additionally has a sufficient strength to guarantee that the nonwoven fabric can be used in the application situations in question.
  • the nonwoven fabric made of wood pulp is to be formed by a dry formation process, for example is to be deposited dry on an endless belt by an air laying process and strengthened in the usual manner by suction on the endless belt. Then, for strengthening, the pure wood pulp web, that is, a fabric web formed from 100% wood pulp fibers, need only be subjected to hydrodynamic needling and then dried.
  • the wood pulp fibers have a length of 1-5 mm. The length depends on the tree, on the species of plant.
  • a nonwoven fabric preferred here should in any case have fibers varying in length, preferably also fibers longer than 5 mm. Surprisingly, it was found that these only short fiber lengths can be entangled with water-jet strengthening so that a nonwoven fabric strengthened in all dimensions can come about.
  • the wet and strengthened wood pulp nonwoven fabric can further be sprayed with a binder before it is then dried immediately afterward.
  • wood pulp web so strengthened can also be blended with other fibers after water needling or bonded to another web made of different fibers such as staple fibers or filaments or also natural fibers.

Abstract

Production of a non-woven tissue from wood pulp on a wet strip is known. The above has a cardboardy, paper-like feel to it. In order to achieve a web with sufficient resilience, the desired wood pulp fibres used to advantage in the hygiene industry for absorbing liquids are thus always mixed with chemical fibres as support fibres. According to the invention, a consolidated tissue with a soft feel and high fluid absorption is obtained by means of needling a non-woven pure wood pulp tissue with water.

Description

EP-A-0 359 615 discloses a method for forming a fabric web only from cellulose fibers such as wood pulp, which web is formed by a wet process and then only dried. Strengthening in the sense of an intertwining of the fibers with one another does not take place there.
EP-A-0 308 320 teaches the preparation of a more highly strengthened fabric web by feeding onto a fabric web made of wet-laid endless filaments a further ply made of up to 90% wood pulp mixed with staple fibers. Both together are then strengthened by hydrodynamic needling.
A similar method is disclosed in EP-A-0 373 974, according to which wet-laid webs made of up to 80% wood pulp are likewise hydrodynamically needled together with webs, now of staple fibers. Such composites do have higher strength, but the capacity for absorbing liquids is unsatisfactory.
The forming of these composites by a dry process is likewise known. In connection with filaments, reference is made to EP-A-0 492 554, where a cellulose content of up to 90% is water-needled with the filaments.
In contrast, U.S. Pat. No. 6,110,848 views a composite as advantageous if the wood pulp ply, with a thickness of up to 90%, has an underply made of a nonwoven fabric made of carded staple fibers between 30 and 100 mm. A third nonwoven fabric made of such staple fibers on top, with the wood pulp ply in the middle, can complete the composite. Everything together is to be hydrodynamically strengthened.
Such composites are advantageous in many application situations, but the manmade fibers that are held to be necessary do not absorb any moisture, for which reason a further product is sought that likewise has adequate strength.
The goal of the invention is therefore to find a method for manufacturing a nonwoven fabric that has the greatest possible liquid absorption capacity and additionally has a sufficient strength to guarantee that the nonwoven fabric can be used in the application situations in question.
In any case it is certain that the nonwoven fabric made of wood pulp is to be formed by a dry formation process, for example is to be deposited dry on an endless belt by an air laying process and strengthened in the usual manner by suction on the endless belt. Then, for strengthening, the pure wood pulp web, that is, a fabric web formed from 100% wood pulp fibers, need only be subjected to hydrodynamic needling and then dried.
As experimental conditions, moistening of the wood pulp fibers between two endless belts with a water pressure of 10 bar was selected first. The actual strengthening needling was then carried out in a single-sided or two-sided manner with a water pressure of only 20 bar. The water pressure should not be chosen too high; a pressure of 15-40 bar is advantageous. The screen selected for support during needling should have only a slight permeability of some 10% open area in order to control pulp loss.
Surprisingly, it was found that the feared wood pulp loss during water needling under these conditions is not very significant. Specifically, this is the subject of WO 01/14624, where along with the carrier ply made of chemical fibers, a ply made of melt-blown fibers is fed initially before the metering of the wood pulp fibers onto the chemical-fiber carrier ply, in order to reduce the wood pulp loss during subsequent hydrodynamic strengthening.
The wood pulp fibers have a length of 1-5 mm. The length depends on the tree, on the species of plant. A nonwoven fabric preferred here should in any case have fibers varying in length, preferably also fibers longer than 5 mm. Surprisingly, it was found that these only short fiber lengths can be entangled with water-jet strengthening so that a nonwoven fabric strengthened in all dimensions can come about.
Before drying, the wet and strengthened wood pulp nonwoven fabric can further be sprayed with a binder before it is then dried immediately afterward.
Of course, the wood pulp web so strengthened can also be blended with other fibers after water needling or bonded to another web made of different fibers such as staple fibers or filaments or also natural fibers.

Claims (8)

1. Method for strengthening a fiber web formed from wood pulp, comprising forming a fabric web consisting essentially of a pure wood pulp ply formed from 100% wood pulp fibers by dry laying wood pulp on an endless belt by a dry formation method, hydrodynamically needling the fabric web consisting essentially of the pure wood pulp ply from both sides for strengthening and then drying the fabric web.
2. Method according to claim 1, further comprising moistening the wood pulp ply with a water pressure of between 15 and 50 bar before the hydrodynamic needling.
3. Method according to claim 1, further comprising before drying and after hydrodynamic needling, feeding a binder onto the strengthened fabric web.
4. Method according to claim 1, further comprising bonding a separate ply having a small content of staple fibers or filaments, or natural fibers to the strengthened wood pulp ply in order to form a composite.
5. Method according to claim 4, wherein the separate ply is laid onto or under the wood pulp ply.
6. Method according to claim 5, wherein the wood pulp ply is water-needled, together with the separate ply.
7. Method according to claim 2, further comprising before drying and after hydrodynamic needling, feeding a binder onto the strengthened fabric web.
8. Method according to claim 4, wherein the wood pulp ply is water-needled, together with the separate ply.
US10/478,974 2001-05-30 2002-05-24 Method for consolidating a material web made from wood pulp Expired - Fee Related US7293336B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10126515.8 2001-05-30
DE10126515A DE10126515A1 (en) 2001-05-30 2001-05-30 Process for consolidating a web of wood pulp
PCT/EP2002/005697 WO2002097181A1 (en) 2001-05-30 2002-05-24 Method for consolidating a material web made from wood pulp

Publications (2)

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US20040221437A1 US20040221437A1 (en) 2004-11-11
US7293336B2 true US7293336B2 (en) 2007-11-13

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US10/478,974 Expired - Fee Related US7293336B2 (en) 2001-05-30 2002-05-24 Method for consolidating a material web made from wood pulp

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US (1) US7293336B2 (en)
EP (1) EP1392905B1 (en)
JP (1) JP2004530060A (en)
KR (1) KR20040025683A (en)
CN (1) CN1520477A (en)
AT (1) ATE437985T1 (en)
BR (1) BR0210935A (en)
CA (1) CA2448937C (en)
DE (2) DE10126515A1 (en)
IL (1) IL158988A0 (en)
WO (1) WO2002097181A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20055074A (en) * 2005-02-18 2006-08-19 Suominen Nonwovens Ltd Wet needled nonwoven fabric containing cellulose fibers and process for its preparation
FR2884530B1 (en) * 2005-04-18 2007-06-01 Ahlstrom Res And Services Sa FIBROUS SUPPORT INTENDED TO BE IMPREGNATED WITH LIQUID.
US8250719B2 (en) * 2009-03-03 2012-08-28 The Clorox Company Multiple layer absorbent substrate and method of formation
DE102009032343A1 (en) * 2009-07-09 2011-01-20 Fleissner Gmbh Und Co. Device for solidifying material web made of fiber and/or filaments, comprises filter band, girder duct for fluidic application of material web, and device for compressing fibers and filaments of material web
JP5721523B2 (en) * 2011-04-28 2015-05-20 ユニチカ株式会社 Method for producing antibacterial cellulosic nonwoven fabric
US9394637B2 (en) * 2012-12-13 2016-07-19 Jacob Holm & Sons Ag Method for production of a hydroentangled airlaid web and products obtained therefrom

Citations (13)

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Publication number Priority date Publication date Assignee Title
US3485706A (en) * 1968-01-18 1969-12-23 Du Pont Textile-like patterned nonwoven fabrics and their production
US3994047A (en) * 1975-04-11 1976-11-30 International Paper Company Apparatus for the twin-wire air laying of fibrous pads
US4755421A (en) * 1987-08-07 1988-07-05 James River Corporation Of Virginia Hydroentangled disintegratable fabric
EP0483816A1 (en) 1990-11-01 1992-05-06 Kimberly-Clark Corporation Hydraulically needled nonwoven pulp fiber web, method of making same and use of same
EP0492554A1 (en) 1990-12-21 1992-07-01 Kimberly-Clark Corporation High pulp content nonwoven composite fabric method of making and use of same
US5128082A (en) * 1990-04-20 1992-07-07 James River Corporation Method of making an absorbant structure
US6022818A (en) * 1995-06-07 2000-02-08 Kimberly-Clark Worldwide, Inc. Hydroentangled nonwoven composites
US6110848A (en) 1998-10-09 2000-08-29 Fort James Corporation Hydroentangled three ply webs and products made therefrom
US20030024092A1 (en) * 2000-02-24 2003-02-06 Vittorio Orlandi Method and device for producing composite nonwovens by means of hydrodynamic needling
US20030213108A1 (en) * 2002-03-28 2003-11-20 Sca Hygiene Products Ab Hydraulically entangled nonwoven material and method for making it
US6836937B1 (en) * 1999-08-19 2005-01-04 Fleissner Gmbh & Co. Maschinenfabrik Method and device for producing a composite nonwoven for receiving and storing liquids
US6836938B2 (en) * 2000-01-17 2005-01-04 Fleissner Gmbh & Co., Maschinenfabrik Method and device for production of composite non-woven fiber fabrics by means of hydrodynamic needling
US20050278912A1 (en) * 2004-06-16 2005-12-22 Westland John A Hydroentangling process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808467A (en) * 1987-09-15 1989-02-28 James River Corporation Of Virginia High strength hydroentangled nonwoven fabric
EP0359615A1 (en) * 1988-09-01 1990-03-21 James River Corporation Of Virginia Manufacture of superabsorbent composite structures
EP0373974A3 (en) * 1988-12-15 1990-09-05 Fiberweb North America, Inc. Method of preparation of a highly absorbent nonwoven fabric
SE467499B (en) * 1990-11-19 1992-07-27 Moelnlycke Ab PROCEDURES FOR HYDROENT ANGLING

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485706A (en) * 1968-01-18 1969-12-23 Du Pont Textile-like patterned nonwoven fabrics and their production
US3994047A (en) * 1975-04-11 1976-11-30 International Paper Company Apparatus for the twin-wire air laying of fibrous pads
US4755421A (en) * 1987-08-07 1988-07-05 James River Corporation Of Virginia Hydroentangled disintegratable fabric
US5128082A (en) * 1990-04-20 1992-07-07 James River Corporation Method of making an absorbant structure
US5137600A (en) * 1990-11-01 1992-08-11 Kimberley-Clark Corporation Hydraulically needled nonwoven pulp fiber web
EP0483816A1 (en) 1990-11-01 1992-05-06 Kimberly-Clark Corporation Hydraulically needled nonwoven pulp fiber web, method of making same and use of same
EP0492554A1 (en) 1990-12-21 1992-07-01 Kimberly-Clark Corporation High pulp content nonwoven composite fabric method of making and use of same
US5389202A (en) * 1990-12-21 1995-02-14 Kimberly-Clark Corporation Process for making a high pulp content nonwoven composite fabric
US6022818A (en) * 1995-06-07 2000-02-08 Kimberly-Clark Worldwide, Inc. Hydroentangled nonwoven composites
US6110848A (en) 1998-10-09 2000-08-29 Fort James Corporation Hydroentangled three ply webs and products made therefrom
US6836937B1 (en) * 1999-08-19 2005-01-04 Fleissner Gmbh & Co. Maschinenfabrik Method and device for producing a composite nonwoven for receiving and storing liquids
US6836938B2 (en) * 2000-01-17 2005-01-04 Fleissner Gmbh & Co., Maschinenfabrik Method and device for production of composite non-woven fiber fabrics by means of hydrodynamic needling
US20030024092A1 (en) * 2000-02-24 2003-02-06 Vittorio Orlandi Method and device for producing composite nonwovens by means of hydrodynamic needling
US20030213108A1 (en) * 2002-03-28 2003-11-20 Sca Hygiene Products Ab Hydraulically entangled nonwoven material and method for making it
US20050278912A1 (en) * 2004-06-16 2005-12-22 Westland John A Hydroentangling process

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CN1520477A (en) 2004-08-11
DE10126515A1 (en) 2002-12-05
JP2004530060A (en) 2004-09-30
CA2448937C (en) 2009-07-14
US20040221437A1 (en) 2004-11-11
DE50213723D1 (en) 2009-09-10
CA2448937A1 (en) 2002-12-05
KR20040025683A (en) 2004-03-24
EP1392905A1 (en) 2004-03-03
WO2002097181A1 (en) 2002-12-05
BR0210935A (en) 2004-06-08
EP1392905B1 (en) 2009-07-29
ATE437985T1 (en) 2009-08-15
IL158988A0 (en) 2004-05-12

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Effective date: 20151113